Not a an of the mask, they're hot. As long as you're in trim I've seen no issues with not wearing one, but I don't typically do a lot of landing in the desert. I know guys who love them. Flew with a guy that dipped while wearing once a few days ago. Most in my unit do not wear them.
. It can very maddening sometimes but also very enlightening to see how the Joint Staff works and why. And even a relatively junior person can have an impact on the staff, the higher ups often value someone's opinion who just came off an operational tour doing the very thing you are briefing just months before where they haven't done it in 10-20 years. 
